Reverse mechanism



March 16 ,'1926. 1,576,964

R. GERBER REVERSE MECHANI SM Filed Feb. 18 1925 I5 Sheets-Sheet 1INVENTOR Ha? I? Gerber March 16 1926.

R. GERBER REVERSE MECHANISM 3 Sheets-Sheet 2 Filed Feb. 18, 1925 March16 1926. 1,576,964

R. GERBER REVERSE MECHANISM Filed Feb. 18 1925 5 Sheets-Sheet 5 RINVENTOR Zph Gerber I 3 \Q g a .0,

m6 R 8 S 8 AT RNEYJ Patented Mar. 16, 1926.

RALTBH GERBER, or RAYMOND, wasnrne'ron, AssIenon r AMERICAN A'nurAo-TURING- & SALES 00., OF RAYMOND, WASHINGTON,

INGTON.

a oonrona'rron or weennnvnnsn MEcHA'nrsM;

Application filed February To all whom it may concern;

Be it known that I, RALPH Games, a citizen of the United StatesoflAmerica, and resident of the city of Raymond, in the 6 county ofPacific and State of Washmgton, have invented certain new and usefulImprovements in Reverse Mechanisms, of which the following isaspecificatlon, J My invention relates to a reversing: device powertransmission shaft, or rather. between the adjacent ends oftwo shafts,whereby continuous motion in one direction in one of these shafts may atwill be caused either to produce continnousmotion in the same or inreverse direction. r

My invention relates particularly to that type of reversing mechanismsof which a typical construction is shownin my previous Patent, No.1,173,567, issued February '29,

The object of my invention is to provide- 7 such improvements upon thereversing mechanism as therein shown, as to make the same more easy ofconstruction, more durable in its operation, and in other ways tosimplify and improve thereon. I

The features of my invention which are new and upon which I desire tosecure Let- I ters Patent may be. determined by reading the followingspecification. and a study of the accompanying drawings. The novelfeatures thereof will then bep'articulearly delined by the claimterminating this speci- 'fication.

In the accompanyingdrawings I have shown my invention incorporated inthespecific construction which is now most pre-- ferredby me- It is,however, evident that many of the specific details of construction mightbe changed without materially altering the invention or departing fromthe spirit thereof. Figure 1 is a top or plan view of my device.

Figure 2 is'a side elevation thereof. Figure 3 is an end elevationthereof. Figure & is a transversesection taken sub-- 4 stantially uponthe broken and offset line l-4 of Figure 5, and Figure 15 is alongitudinal scctionaleievation of my device, Y taken upon the centralplane of the shafts,

The two shafts, 1 and 1-0, are the shafts which. are to be connected bythe reversing 18, 1925. Serial No.8,977.

mechanisnn One of these shafts may.- be called; the driving shaft andthe other the driven shaft. Which of these shafts isused for therespective purpose is immaterial,

either may be the drivingshaft and either the-driven shaft. Upon theshaft 1 is secured acrank disk 2 so as to .befixedv withrelation-thereto. Upon the other shaft, 10,

These may be conveniently secured by providing them wlth integralsleevesinto which the ends of the shafts enter andto which they aresecured. These crank disks at all times turn in correspondence each withits respectivev shaft.

Mounted upon the shafts, or :upon :the sleeves by whlch the crank disksare secured to the shafts, 1s a casing 5. 'For convenience ofconstructionthis is preferably made of ,twoparts securedtogether upon a:transverse plane, correspondingwith that of the axis oft'he transverseshaft 4L2. This casing is provided with two friction brake or clutchsurfaces, one adaptedVitov be engaged :by a

brake band 15, which brake band is fixedly held againstrotation. When,therefore, this brake band is caused to grip the casing, the latterWl'li' be held against rotation. The

and '10 at right angles and normally at the center of the distancebetween the two shafts, although this latter distance may be varied.Mounted to slide uponthis shaft is l a sleeve or block 511 which hascrank pins 4 and 40integral therewith and alined with each otherextending in opposite directions from the sleeve 4L1- These form crankpins which have sliding 1 and turning bearing in the bore of twospheroidalbearing members 9,

mounted to turn in complement-a1 spheroidal hearings carried by "thecrank disks 2 and 20. For purposes of assembly the spheroidalbearings ofthe crank disks each include a removable plate,z21' and 22, which 0 and80, which bearing members are vis secured a corresponding crank diskaQO.10 of the sort designed to be inserted in a' other-friction or clutchsurface of the-casing .cepts the extended axis of the two shafts l areremovably fixed to the inwardly facing surface of said crank disks.

By making the crank pins as an integral part of the sliding sleeve 41,greater strength is given to these parts than under the constructionillustrated in my patent previously referred to. In said patent thecorresponding members 20 thereof had reciprocal movement in a sleeve andwere also subjected to transverse bending strains which, under thecircumstances would greatly increase the friction and the wear of theparts. By making the crank pins both as an integral member of the beamwhich also includes the sliding sleeve 411, a more rigid construction isprovided and lateral bending efforts within the crank pin parts areavoided. Furthermore, by the construction shown in the presentinvention, effective greasing of all the parts is better secured by theuse of grease or oil within the casing.

As the principle of the mechanical operation of this device is the sameas that involved in the device of the previously mentioned patent,detailed reference thereto is not thought to be necessary at this time.

The mechanism employed for controlling the two friction brakes will nowbe de scribed. A sleeve 6 surrounds and is secured to the sleeve of oneof the crank disks, as the disk 20. This sleeve 6 thusparticipates inall of the turning movements of the crank disk 20. This sleeve carries ahood-like member which extends over and covers that section of thecasing 5 upon which the friction brake 90 is mounted. Itincludes aradially positioned or disklike section 60 and a series of arms as 61which extend over the end of the casing and are spaced out wardlytherefrom a sufficient distance to accommodate the friction brake band90. The outer cylindrical section of this member is preferably made ofopen-work character, as by the use of the bands 61 which are clearlyshown in extent and position in Figure 4. The purpose of this hood istwofold; first, to form a support and carrying member for the frictionband; second, to form a protection therefor so that the operator is notlikely to be brought into contact therewith. The open-work character ofconstruction of this part is due in considerable measure to a desire tohave a construction such that the friction band may be removed andreplaced conveniently without having to disassemble other parts.

The friction band is really composed of two parts, one a metal band 9and the other the friction insert or lining member 90. One end of thisis secured by a pin 98' which lies beneath one of the bars 61 of theenclosing hood. The other end of the band is supported by a bar 71,which bar isprovided, as is clearly shown in Figure 1, with cam-inclinedsurfaces 74 so that by reciprocation of this bar the brake may betightened or loosened in accordance with the direction of movement ofthe bar 71. The bar 71 is bent in shape, one end thereof, being that endwhich occupies a radial position with reference to the shaft and thecasing, being secured to a sleeve 7 which is mounted so asto bereciprocated upon the sleeve 6. 'lhisreciprocal movement is shown assecured byproviding the sleeve 7 with a peripheral circular groove inwhich is mounted semi-circular shoe or guide 72, the latter beingprovided with trunnions 73 which are engaged by notches in the end ofarms 83. These arms 83 are shown as being integrally formed upon theends of a connecting yoke-bar 81, which is pivoted upon journals inframe members 82. To one end of the arms 83 is secured the operatinglever 8 by which the brake band operating means are actuated.

The other brake band 15 is operated in a similar manner through theaction of a bar 16 secured by one end to the operating lever 8. This hasa cam-inclined surface 17 by which the movable end of the brake band isgiven peripheral movement to apply or release the brake. This portion ofthe link 16 is provided with a thrust support, adjustable in position. Aconvenient way of securing this result is to use a set screw 18, whichis mounted in a yoke 19 carried by or fori'nin'g a part of the frame ormain sup port for the device as a whole. The brake band 9, 90, is alsoadjustable in the same way, as is best illustrated in Figures 1 and 4. Abar or block 64 is mounted in guides upon the enclosing hood 61. Anadjusting bolt 66 screwing through the same bears upon one face of thebar 71 by which the operation of the brake is controlled.

This thrust bolt may be' secured in adjusted position as by a set screw67. The application and the release of this brake is determined bywhether'the thrust bolt 66 is engaged by the straight surface 75 or bythe corresponding straight surface at the other end of the cam-incline74. The brake controlling links or bars 71 and 16 are so constructed andapplied to said bars that when one brake is applied the other brake isreleased.

The gripping of the casing by the brake 9 causes the same to turn withthe shaft 10. Therefore, the other shaft 1 must turn in the samedirection and at the same rate as the shaft 10. If, however, the brake 9be released and the brake 15 be applied, the revolution of the casing 5is stopped and it is held non-rotative. When this occurs the sleeve 41will, by the action of the crank pins 4 and 10 and of the crank disks 2and 20, be caused to reciprocate back and forth upon the transverseshaft 12 and this will result in the two crank disks turning in oppositedirections and at the same rate of speed.

What I claim as my invention is:

In a device of the character described, the combination with the twoaligned shafts, a casing adapted to turn with the shafts or to be heldstationary, the casing having two braking surfaces, a fixedly-securedbrake cooperating with one of said braking surfaces, amember rotativewith one shaft and carrying a brake band cooperative With the otherbraking surface, a sleeve rotative with the same shaft but movablelengthwise thereof, a bar carried by said sleeve and supporting one endof the rotative brake band, a bar supporting one end of the other brakeband, both of said bars having cain inclines by the action of Which inthe reciprocation of the bars the brakes are controlled, and a controlling lever connected with the sleeve and one of the bars.

Signed at Raymond, Pacific County, Washington, this 6th day of February,1925.

RALPH GERBER.

